31628381212 has 24 divisors (see below), whose sum is σ = 56709142560. Its totient is φ = 15425898240.

The previous prime is 31628381173. The next prime is 31628381231. The reversal of 31628381212 is 21218382613.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287864 + ... + 1312192.

It is an arithmetic number, because the mean of its divisors is an integer number (2362880940).

Almost surely, 2^31628381212 is an apocalyptic number.

It is an amenable number.

31628381212 is a deficient number, since it is larger than the sum of its proper divisors (25080761348).

31628381212 is a wasteful number, since it uses less digits than its factorization.

31628381212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32301 (or 32299 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The spelling of 31628381212 in words is "thirty-one billion, six hundred twenty-eight million, three hundred eighty-one thousand, two hundred twelve".